MC7455 'Call Failed'

[Dan Williams]

On Thu, 2017-06-22 at 15:11 -0700, Tim Harvey wrote:
> On Thu, Jun 22, 2017 at 2:59 PM, Dan Williams <dcbw at redhat.com>
> wrote:
> > On Thu, 2017-06-22 at 23:29 +0200, Aleksander Morgado wrote:
> > > On Thu, Jun 22, 2017 at 10:11 PM, Tim Harvey <tharvey at gateworks.c
> > > om>
> > > wrote:
> > > > > > Also, I'm unclear how to NetworkManager on the QMI devices:
> > > > > > root at ventana:~# nmcli connection add type gsm ifname cdc-
> > > > > > wdm1
> > > > > > con-name
> > > > > > mc7455 apn h2g2
> > > > > > Connection 'mc7455' (5dc4516e-e857-4917-9542-0dee211b692a)
> > > > > > successfully added.
> > > > > > root at ventana:~# nmcli connection up id mc7455
> > > > > > Error: Connection activation failed: No suitable device
> > > > > > found
> > > > > > for this
> > > > > > connection.
> > > > > > 
> > > > > > What is the appropriate interface to use for QMI devices
> > > > > > (wwan1
> > > > > > gives
> > > > > > the same error)? This is supposed to be the 'control
> > > > > > interface'
> > > > > > not
> > > > > > the 'network interface' correct?
> > > > > > 
> > > > > 
> > > > > Retry without the "ifname cdc-wdm1" part; just add a gsm
> > > > > connection
> > > > > type with the APN settings, without binding to an explicit
> > > > > modem,
> > > > > and
> > > > > try to get that connected.
> > > > 
> > > > I tried that originally but it requires ifname:
> > > > 
> > > > root at ventana:~# nmcli connection add type gsm con-name mc7455
> > > > apn
> > > > h2g2
> > > > Error: mandatory 'ifname' not seen before 'apn'.
> > > 
> > > Dan, Thomas? I keep forgetting about this... How do you create a
> > > connection not bound to any device? And, how do yo create a
> > > connection
> > > bound to a given device/sim?
> > 
> > I filed a bug on that:
> > 
> > https://bugzilla.gnome.org/show_bug.cgi?id=780323
> > 
> > Dan
> 
> Dan, it looks like network manager ignores the 'interface-name' param
> in the connection configs as I have an MC7354 here that I was able to
> use fine with NetworkManager by giving it 'ifname cdc-wdm0' (which is
> wrong)
> 
> On the MC7354:
> root at ventana:~# nmcli connection down id 'Wired connection 1'
> Connection 'Wired connection 1' successfully deactivated (D-Bus
> active
> path: /org/freedesktop/NetworkManager/ActiveConnection/1)
> root at ventana:~# nmcli connection add type gsm ifname cdc-wdm0 con-
> name
> mc7354 apn m2m.com.attz
> Connection 'mc7354' (6d89ff6e-6eb6-4f0f-80d1-fb081165f710)
> successfully added.
> # show status
> root at ventana:~# nmcli connection show
> NAME                UUID                                  TYPE       
>      DEVICE
> Wired connection 1  ea640ea4-3049-39e4-9cdf-a5e53971ced8  802-3-
> ethernet  --
> mc7354              6d89ff6e-6eb6-4f0f-80d1-
> fb081165f710  gsm             --
> # connect
> root at ventana:~# nmcli connection up id mc7354
> [  305.557465] IPv6: ADDRCONF(NETDEV_UP): wwan0: link is not ready
> Error: Connection activation failed: Active connection could not be
> attached to the device
> ^^^^^ not sure what this is from - the connection is made and traffic
> works
> [  305.688145] systemd-journald[162]: Successfully sent stream file
> descriptor to service manager.
> [  305.774230] systemd-journald[162]: Successfully sent stream file
> descriptor to service manager.
> root at ventana:~# ping www.google.com
> ^^^^^ works
> 
> I'm still not clear why using network-manager fails on the MC7455
> which I can get working with libqmi directly and with modemmanager
> directly:
> 
> On the MC7455:
> root at ventana:~# nmcli connection down 'Wired connection 1'
> Connection 'Wired connection 1' successfully deactivated (D-Bus
> active
> path: /org/freedesktop/NetworkManager/ActiveConnection/1)
> [   44.722377] systemd-journald[168]: Successfully sent stream file
> descriptor to service manager.
> root at ventana:~# nmcli connection add type gsm ifname cdc-wdm0 con-
> name
> mc7455 apn h2g2
> Connection 'mc7455' (426c0811-1f1e-439b-b497-b839502c6a4f)
> successfully added.
> root at ventana:~# nmcli connection up id mc7455
> Error: Connection activation failed: No suitable device found for
> this
> connection.
> ^^^^ No IP config on wwan0

Yeah, because "no suitable device found".  Can you 'nmcli g log level
trace' and reproduce the issue, then we can take a look at the NM logs.
 Depending on your platform, that could be "journalctl -b -u
NetworkManager" or they could be files somewhere in /var/log like
/var/log/daemon.log, /var/log/NetworkManager.log, or /var/log/messages.

Dan